Old page to Compare FM Transmitter kits, RF circuits...

Kit	Broadc@st W@rehouse	Broadc@st W@rehouse bw0001	Mighty's M@X-1.1	North Country R@dio MPX96	P@naxis FMX	R@msey FM-10A	R@msey FM-25	Sm@rt Kit 25 W VCO	Veronic@ 1W VCO	Veronic@ 1W PLL	Veronic@ 5W VCO	Kit
RF Output	700mW typ >1W	1W typ 800mW min	4 W typ !!!	10mW, 1W 1	20-500mW ~200mW	Couple of W ~8 mW	Couple of W ~8 mW	25W	1 Watt. >900mW @16V	900 mW typ	5 W	RF Output
VCO / PLL	PLL, frequency doubler	PLL with LCD	PLL with LCD and 4W Power stage	PLL	PLL, optional LCD	VCO	PLL	VCO	Frequency Doubler VCO, drifts with temperature, Vcc, Antenna changes	PLL	VCO	VCO / PLL
Mono/Stereo	Mono	Mono	Mono	Stereo	Mono	Stereo	Stereo	Mono	Mono	Mono	Mono	Mono/Stereo
Frequency Range	87.5-108 MHz 2	87.5-108 MHz	86-110 MHz 2	76-108 MHz	87.9 - 107.9 MHz	88-108 MHz	88-108 MHz	88-108 MHz	88-108 MHz	88-108 MHz	88-108 MHz	Frequency Range
Harmonics	- 50 dB	- 60 dB -62dB	-60 dB	-50 dBc	- 40 dB -31dBc	Very good filter needed	Very good filter needed	???	-43 dB	-35 dB	???	Harmonics
Spurious signals	- 60 dB	- 75 dB even better	-68 dB	-60 dBc	- 50 dBc -67 dBc	Very good filter needed	Very good filter needed	???	???	- 40 dB	???	Spurious signals
Audio Freq response	20Hz-70KHz	20Hz-100KHz	20Hz-70KHz	20Hz-15KHz	40Hz - 90KHz	???	???	???	30Hz - 76KHz	30Hz - 76KHz	30Hz - 76KHz	Audio Freq response
S/N Ratio	> 75 dB	> 75 dBu	???	???	???	???	???	???	> 60dB	75 dB	> 60 dB	S/N Ratio
Remarks	No LCD. See review Marconi's review	LCD Included "No Tune" design. Optional pre-emphasis. Marconi's review See my review	LCD menu system helps tune TX. Built-in diagnostics. See my review	Coils must be built, Component labels are not silk -screened onto board.	LCD available for $ 70. Direct Freq readout on BCD switches. See Schematics and Review Here is Spectral Output Marconi's review	See FAQ	LCD available from others. See Schematic. See Spectral Output 3 More plots	Only pre-assembled available. Straightforward design similar to those on Pulsar / HansH site. Badly needs a Zener around oscillator. See Schematic	See Marconi's Review. Could use a Voltage regulator !!	No LCD. See Spectral Output. See Schematics Why does it have a big 1.5x harmonic ?		Remarks
Price indication kit form, ex-works	£ 57.95 = $ 93	£ 89.95 = $ 145	$130	$ 75	$ 120	$ 34.95	$ 129.95	Approx 150$	£ 37.95 = $ 61	£ 66.95 = $ 108	£ 51.95 = $ 84	Price indication kit form, ex-works

1. More power available in "Export mode" or via simple mods.
2. Frequency range easily changeable by Manufacturer
3. It appears that R@msey now only sell the FM-25A, a latter model that has a built-in filter that greatly improves Spectral output (Lesser harmonics, not lesser Spurs and Phase noise). Visit Mark Wyman's site to see Spectral Output of current version.

To avoid getting sued, I must state here that :
A) I do not aid / abet / suggest / promote / condone any illegal activity
B) Data shown above is fictitious and has no connection to any similarly n@med M@nufacturers.

The above data is based on the M@nufacturer's published data or rumours on the Net as of Sept 1998.
It is not verified or tested by me, or approved by the M@nufacturer.

The M@nufacturers could be making other transmitter kits besides those mentioned here.
M@nufacturers normally reserve the right to improve their product and change specs/price at any time.

IMPORTANT : Please always contact the M@nufacturers to find out latest and correct specifications / price.
Please feel free to contact me if you have any corrections/suggestions for the above table.

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